The casuals have all left to tablets and smartphones, that's a fact. What Nintendo is doing is trying to compete in that branch I see. It's gonna be real hard to make it seem worth to buy either this Nintendo tablet thing or a regular tablet.
I would definitely just forget the casual industry as that one is pretty much dead now for consoles. Unless the NX is really cheap or something, it's probably gonna flop.
Also, since it runs on a Tegra 1 or 2, this means it's gonna be weaker than PS4 and XBONE, especially with the new Scorpio and NEO soon releasing. So Nintendo is gonna lose on third party support again. Consumers are gonna have to buy both the NX and another console/PC if they wanna play all types of games.
The X2 should be more powerful than the PS4 and Xbox One. Easily. Although we don't know the full specs yet. Although, the X1 rumor probably is stemming from the dev kits are using the X1 while Nvidia finishes the X2/NX version of the chip.